Drawwork



March J. s MORGAN, JR

DRAWWORK Original Filed Dec. 21, 1935 2 Sheets-Sheet 1 March 13, 1941 J.s. MORGAN, JR 2,235,080

DRAWWORK Original Filed Dec. 21, 1935 2 Sheets-Sheet 2 Patented Mar. 181941 UNITED STATES DRAWWORK John S. Morgan, Jr., Manhattan Beach,Calif., as-

signor, by mesne assignments, to The National Supply Company,Pittsburgh, Pa., a corporation of Pennsylvania Original applicationDecember 21, 1935, Serial N 0. 55,591, now Patent No. 2,161,075, datedJune 6, 1939; Divided andthis application May 14,

1937, Serial No. 142,594

5 Claims.

This invention relates to rotary drawworks applicable for use inconnection with drilling equipment as utilized in drilling for water,oil or gas.

and more particularly to the type of rotary drawworks employed inconnection with the rotary method of drilling. This application is adivision of my copending application, Serial No. 55,591, filed December21, 1935, now Patent No. 2,161,075, dated June 6, 1939, for Dr awworks.

It is an object of this invention to provide an improved form of rotarydrawworks wherein the drive to the drum mounted upon the drumshaft ishad through a transmission drive in such a manner as to eliminate thetorque of the drive being imposed upon the drumshaft.

Other objects and advantages of this invention it is believed will beapparent from the hereinafter contained description of the preferredembodiment of my invention as illustrated in the accompanying drawings.I

Figure 1 is a top plan view partly in horizontal section of the rotarydrawworks embodying my invention.

Figure 2 is a. sectional end view taken substantially on the line 22 ofFigure 1.

In the rotary drawworks illustrated in-the accompanying drawings Iindicates a drumshaft and 2 the line or drive shaft. Mounted upon thedrum shaft I is a drum 3 which may be of'any suitable or desirableconstruction.- The shafts I and 2 are supported upon end frames 4 in aparticular manner which will be"'ap'parent from my copendingapplication, Serial No. 55,591, now Patent No. 2,161,075, dated June 6,1939. for Drawworks. The drum 3 is provided with flanges 5 to whichbrake rims 6 are secured. The drum 3 is secured to the shaft I by meansof keys 1. Drive shaft 2 is driven from any suitable or desirable sourceof power by means of a sprocket 8 secured to the shaft 2.

In order to obtain the particular multiple speed transmission whichforms thesubject matter of my copending application above referred to, asleeve 9 is rotatably mounted upon the shaft 2 and is provided withdrive sprockets I0 and II which are connected by transmission chainswith corresponding sprockets I2 and I3 mounted upon the drum shaft I. Adrive sprocket i4 is journaled on the shaft 2 and is adapted to bereleasably clutched thereto through the medium of a double clutch I5.The drive from the sprocket I4 is through a chain to an intermediatespeed sprocket l6 which is integrally formed with a sleeve ll of thesprocket I3. Means are provided for driving the customary rotary machinefrom the drive shaft 2, which means includes a sprocket I8 which isjournaled upon the shaft 2 adapted to be releasably engaged therewiththrough the medium of the double clutch I5. A

chain connects the sprocket l8 with the double I rotary drive sprocketthe drum shaft l. a A clutch 20 is splined upon the sleeve of the doublesprocket I9 to be engaged with the clutch I 9 which is journaled uponring 2i formed integrally upon the end of the 10 sleeve I! to permit ofthe drive as fully set forth in my copending application above referredto.

The low speed drive from the drive shaft 2 to the drum shaft I is ofcourse the drive through which the greatest torque is transmitted as thelow 15 speed is ordinarily used where the greatest load is encountered.For this reason I have illustrated the particular drive embodying mypresent in-,

' vention as adapted particularly with thelow speed drive. However, itis obvious that this form .20

of drive may likewise be incorporated in connection with the otherdrives to the drum 3 if occasion demands.

In orderto eliminate the torque occasioned by shaft 2 to thedrum 2'25being-transmitted through. he drum shaft I, I

the drive from the drive prefer toform this transmission drive asfollows: Securedtd-the end flange 5 of the drum 3 is a removable clutchring 22 which is secured in position by means of bolts 23 and isprovided with 30 drive keys 24. The sprocket I2 is formed with anaxially extending outer sleeve 25 and inner sleeve I2 and isjournaledupon the shaft I on bearings -26. The inner sleeve I2 is fixed upon theshaft slidably l against longitudinal movement. mounted upon the innersleeve I2 is an annular clutch ring 21 which issplined to the sleeve 25.The clutch ring 21 is secured by means of studs 28 to a clutch shiftercollar 29 slidably mounted upon the shaft I between the sprocket l2 andend frame 4. A shifter fork 30 is provided for the clutch collar 29 toenable the clutch collar 29 to be shifted axially of the shaft I tothereby move the clutch ring 21 into or out of engagement with theclutch faces of the clutch ring 22.

By this construction the torque transmitted from the drive shaft 2 indriving the drum-3 is transmitted directly to the drum 3 and not throughthe drum shaft I.

Having fully described my invention, it is to 1. In a hoistingmechanism, the combination as of a shaft, a drum mounted on the shaft, atransmission drive member rotatably mounted on said shaft, said memberhaving an extension aligned axially of the shaft, clutch means forreleasably coupling the transmission drive member to the drum, saidclutch means including a clutch ring positioned within said extension,spline means between the outer diameter of the clutch ring and the innerdiameter of said extension, means independent of said spline meansadapted to slidably support said clutch ring, the drum having an endflange, a complementary clutch ring on said end flange, means includinga shifter collar mounted on the shaft to shift the first named clutchring into driving engagement with the complementaryclutch ring, thetransmission drive member being interposed between said shifter collarand said end flange.

2. In a rotary drawworks, the combination of a shaft, 9. hoisting drummounted on the shaft, a transmission drive member rotatably mounted onsaid shaft, inner and outer annular extensions formed concentrically onsaid transmission drive member, a clutch ring supported by the innerextension, means including cooperating splines on said clutch ring andthe outer extension adapted to form a driving connection between thetransmission drive member and the clutch ring, a clutch memberassociated with said drum, and means to shift the clutch ring intodriving engagement with the said clutch member.

3. In a rotary drawworks, the combination of a shaft, a hoisting drummounted on the shaft,

9. transmission drive member rotatably mounted on said shaft, inner andouter annular extensions formed concentrically on said transmissiondrive member and cooperating to form an annular recess, a clutch ringhaving a portion thereof disposed within said annular recess, saidclutch ring being supported by the inner extension and forming a splinedriving connection with the outer extension, clutch laws on said drum,and

means to shift said clutch ring into driving engagement with the clutchlaws on the drum. 5

4. In a hoisting mechanism, the combination of a shaft, a hoisting drummounted on the shaft. a tran drive member rotatably mounted on saidshaft, said member having inner and outer annular extensions formedthereon, a clutch ring slidably supported on the innerextension,-complementary spline means formed between the outer extensionand the outer periphery of the clutch ring, a clutch ring in drivingrelation with said drum, and means to shift said first clutch ring intodriving engagement with the second named clutch ring.

5. In a hoisting mechanism, the combination of a shaft, a sprocketmember and a drum member on said shaft, a sleeve element on one of saidmembers provided with internal spline means extending axially of andencircling a portion of said shaft, axially extending driving laws onthe other of said members, a movable element operatively positionedbetween the sprocket 25 member and the drum member and adapted to form areleasable driving connection therebetween, said movable element beingsupported from within its central cylindrical bore for sliding movementaxially of the shaft, external spline means on said movable elementadapted to slidably and non-rotatably engage within said internal splinemeans, axially extending driving Jaws on one end of said movableelement, said jaws having contact faces extending radially of the shaft,and means to shift said movable element axially of the shaft to bringsaid driving jaws into engagement.

JOHN s. MORGAN, in. w

